The Boeing Company

Mark D Gilcreest

Leanne L Lehman

Jack William Mauldin

William R Schell

Edward O Jorgenson

Eric Winter

Daniel F Gelzer

Trevor George Sleath

Ryan J Clabots

Matthew J Woerly

William C Cromer

Benjamin S Northup

Merlin C Windels

There is provided a heat shield for an aircraft. The heat shield has a pair of side skins. Each side skin is formed of a heat resistant material and has a side skin edge. The heat shield further has a lower skin formed of a heat resistant material and having lower skin edges. The lower skin edges extend an extended length past the side skin edges. The lower skin edges are separate from the side skin edges. A gap is formed between the side skin edges and the lower skin. The lower skin is configured to thermally expand without contacting the pair of side skins. The heat shield further has a plurality of frame members attached to the lower skin. The heat shield further has an air ingress restrictor assembly associated with one of, the pair of side skins, or the lower skin.

Heat shield for an aircraft and method of using the same

A method of forming a weld on a work piece is disclosed. The method may include creating an internal cavity along the work piece and extending a conduit having an exit orifice into the internal cavity such that the exit orifice may be positioned adjacent to the weld to be formed. The method may further include supplying a purge gas to the conduit, the purge gas being carried through the conduit and pushed out of the exit orifice so as to displace undesirable gasses away from the weld to be formed and then subsequently forming the weld.

Integrated gas purge path for welded sandwich structure

An acoustically treated exhaust centerbody comprising a body including a body fore portion and a body aft portion. An internal passageway extends through the body in the axial direction. A resonator in the body fore portion includes a plurality of acoustic chambers. A plurality of ribs in the resonator form fore/aft walls of the acoustic chambers. Each rib is shaped substantially as a section of an annulus. A plurality of radial fins extend between adjacent ribs. The fins form sidewalls of the acoustic chambers. A skin overlies the acoustic chambers and forms an outer surface of the resonator.

Acoustically treated exhaust centerbody for jet engines and associated methods

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Kent, WA, United States of America

Mark D Gilcreest